I've decided to get back into 40k again after a big gap of not playing, I played 2nd ed through to 5th or 6th at which point I moved over to WFB 8th ed, I'm a regular AoS player but it's not quite scratching my tactical itch. 8th edition 40k looks like a great ruleset and a good opportunity to jump back in.

I was wondering if there were any good practices with 8th edition list making, potential pitfalls or established conventions in the current scene?